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Re-installed and the pedal went to the floor on startup. Guess it had a ball bearing.

Perfect, all the generic schematics I found online show a ball, and one video on YouTube the guy claims to have misplaced the ball on a rebuild, 85 Chevy, and the unit went full host and broke and bent some shafts on startup... But I will take your advice and throw this in as is. I think only my piston seal was bad I had a bad leak out of my weep hole.

Yes, that's the part. It slides out pretty easily and I did remove it... But I don't know if there was a ball in there. There is no spring tension or anything so it couldn't have shot far.

Followed the instructions posted here on replacing seals on the hydroboost assembly. My question is this, is my accumulator check valve supposed to have a ball bearing in it? The *generic* schematics included show one, and everything I see online shows a ball bearing. Cautionary videos online say to make sure you put that ball bearing back or severe damage will be caused. But I am about 87% sure I did not have a ball bearing inside my valve when I took it apart. can anyone give me any insight. Edit, working on 99 Cummins.